'Eternal' in the Bible

and the life was manifested, and we have seen and testify and proclaim to you the eternal life, which was with the Father and was manifested to us—

This is the promise which He Himself made to us: eternal life.

Everyone who hates his brother is a murderer; and you know that no murderer has eternal life abiding in him.

And the testimony is this, that God has given us eternal life, and this life is in His Son.

These things I have written to you who believe in the name of the Son of God, so that you may know that you have eternal life.

And we know that the Son of God has come, and has given us understanding so that we may know Him who is true; and we are in Him who is true, in His Son Jesus Christ. This is the true God and eternal life.